1531279 has 2 divisors, whose sum is σ = 1531280. Its totient is φ = 1531278.

The previous prime is 1531253. The next prime is 1531297. The reversal of 1531279 is 9721351.

Together with next prime (1531297) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1531279 - 2¹³ = 1523087 is a prime.

1531279 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1531379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 765639 + 765640.

It is an arithmetic number, because the mean of its divisors is an integer number (765640).

2^1531279 is an apocalyptic number.

1531279 is a deficient number, since it is larger than the sum of its proper divisors (1).

1531279 is an equidigital number, since it uses as much as digits as its factorization.

1531279 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1890, while the sum is 28.

The square root of 1531279 is about 1237.4485847905. The cubic root of 1531279 is about 115.2616349304.

The spelling of 1531279 in words is "one million, five hundred thirty-one thousand, two hundred seventy-nine".